erp-imprimelibros/src/main/java/com/imprimelibros/erp/users/RoleDaoImpl.java

package com.imprimelibros.erp.users;

import jakarta.persistence.EntityManager;
import jakarta.persistence.TypedQuery;

import java.util.Optional;

import org.springframework.stereotype.Repository;

@Repository
public class RoleDaoImpl implements RoleDao {

	private EntityManager entityManager;

	public RoleDaoImpl(EntityManager theEntityManager) {
		entityManager = theEntityManager;
	}

	@Override
	public Optional<Role> findRoleByName(String theRoleName) {

		// retrieve/read from database using name
		TypedQuery<Role> theQuery = entityManager.createQuery("from Role where name=:roleName", Role.class);
		theQuery.setParameter("roleName", theRoleName);
		
		Role theRole = null;
		
		try {
			theRole = theQuery.getSingleResult();
		} catch (Exception e) {
			theRole = null;
		}
		return Optional.ofNullable(theRole);
	}
}